User`s manual

Alcorn McBride Digital Video Machine DVM-7400 User’s Manual Rev 1.5
63
Parallel Control
Parallel Inputs
Be sure to configure
the Parallel Input
mode DIP-switch
before connecting any
wires.
The Digital Video Machine can be controlled using either contact closures or voltage
inputs on the female DB-37 Control Connector. DIP-switch number 1 on the 4-key
DIP-switch bank selects between the two input types. Voltage inputs are rated for 24
VDC. The table below describes the function of each input.
Function Voltage
Input
Pins
Contact
Closure
Pins
Description
Resume 11(+),1(-) 1,20 Resumes playing if paused or stilled.
Also, serves as an “advance to next
entry” command when machine is
running a Playlist (after a Wait, or to
jump out of a Loop, or to advance to
next file in an Interruptible list.)
Still 12(+),2(-) 2,21 Stills the clip currently playing.
Stop 13(+),3(-) 3,22 Stops the file currently playing. If the
file is a Playlist, it is aborted.
Loop 14(+),4(-) 4,23 Causes the selected file to loop
indefinitely from beginning to end. If the
file is a Playlist, all tracks will be
played and then the file will loop. The
state of this input is examined at the
start of each file.
File Play 1 15(+),5(-) 5,24 Binary-encoded input plays files 1-15.
File Play 2 16(+),6(-) 6,25 Binary-encoded input plays files 1-15.
File Play 4 17(+),7(-) 7,26 Binary-encoded input plays files 1-15.
File Play 8 18(+),8(-) 8,27 Binary-encoded input plays files 1-15.
The binary file play inputs are used to play the first 15 files. These inputs may be
contact closures or voltages, depending upon the input select DIP switch described in
the Configuration DIP switch section of this manual. The inputs are change-sensitive;
that is, when a change is detected, the new file will be played. It is therefore important
that the four bits change at the same time (<50ms from each other to be exact).
If the same file number is selected repeatedly it will normally interrupt itself and begin
again. The only exception to this rule is when a Playlist is currently running and is in
an Uninterruptible state. In this situation, the file input will be completely ignored (see
the Playlist section for more information).